I'll toss in my two cents on the great Captain Black Original vs Lane RLP-6 debate!
The topping seems to be the same on both blends, but Captain Black is noticably more heavily topped and features more black cavendish and less burley; giving the smoke from Captain Black greater density and more sweetness than RLP-6.
I actually prefer Captain Black over RLP-6, since I very much like the flavor of the topping (which tastes almost identical to Coffee Mate Italian Sweet Créme coffee creamer to me) and it's more prominent in Captain Black, whereas with RLP-6 you get less of that creamy vanilla topping flavor and more of a somewhat low grade sweetened burley taste. I also find the retrohale on Captain Black original to be completely smooth and comfortable, whereas the retrohale on Lane RLP-6 tends to sting my sinuses a bit.
So, between the two I'll stick with Captain Black. For a visual comparison, here's Captain Black original on the left vs Lane RLP-6 on the right:
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